# SparkFun Battery Babysitter - LiPo Battery Manager

**Type:** Product page · **SKU:** PRT-13777 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/sparkfun-battery-babysitter-lipo-battery-manager.html ([markdown](https://core-electronics.com.au/sparkfun-battery-babysitter-lipo-battery-manager.html.md))

The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively.

## Pricing

- **Price:** $39.90 (inc GST) — $36.27 AUD, exc GST
- **Quantity discounts:** 5+ $35.18 (exc GST) · 25+ $34.45 (exc GST) · 100+ $33.01 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 1 today, and up to 80 more in 5–11 days.

## Description

The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively.

The Battery Babysitter features a pair of Texas Instruments LiPo-management ICs: a BQ24075 battery charger and a BQ27441-G1A fuel gauge. The charger supports adjustable charge rates of up to 1.5A, as well as USB-compliant 100mA and 500mA options. It also features power-path management, guaranteeing power to your project even if the battery has died. The self-calibrating, I2C-based BQ27441-G1A measures your battery’s voltage to estimate its charge percentage and remaining capacity. It’s also hooked up to a current-sensing resistor, which allows it to measure current and power! It’s a handy IC to have, if you ever need to keep an extra eye on your project’s power draw.

[GET STARTED WITH THE BATTERY BABYSITTER GUIDE!](https://learn.sparkfun.com/tutorials/battery-babysitter-hookup-guide)

Features:

- LiPo Charger and LiPo Fuel Gauge combined into one board
- DIP-switch-selectable charge rates of 100mA, 500mA or 1.5A
- MicroUSB port for charging, or external options
- Dynamic power-path managment maintains a reliable output supply
- On/Off switch disconnects the battery for more power saving
- 5V-tolerant I2C interface to fuel gauge
- Fuel gauge measures voltage, percentage, and current
 
Documents:

- [Schematic](https://core-electronics.com.au/attachments/localcontent/sparkfun-battery-babysitter-v10-schematic_1981964e9f5.pdf)
- [Eagle Files](https://core-electronics.com.au/attachments/localcontent/sparkfun-battery-babysitter-v10_20209e30221.zip)
- [Hookup Guide](https://learn.sparkfun.com/tutorials/battery-babysitter-hookup-guide)
- [Datasheet](https://core-electronics.com.au/attachments/localcontent/bq24075_2818952799c.pdf) (BQ24075 Charger)
- [Datasheet](https://core-electronics.com.au/attachments/localcontent/bq27441-g1_10444d593eb.pdf) (BQ27441-G1 Fuel Gauge)
- [Arduino Library](https://github.com/sparkfun/SparkFun_BQ27441_Arduino_Library)
- [GitHub](https://github.com/sparkfun/Battery_Babysitter)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/p/r/prt-13777.jpg)